Blar i PhD theses (TN-IMF) på forfatter "Helleland, Christer"
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A mathematical approach to Wick rotations
Helleland, Christer (PhD thesis UiS;536, Doctoral thesis, 2020-09)In this thesis we define Wick-rotations mathematically using pseudo-Riemannian geometry, and relate Wick-rotations to real geometric invariant theory (GIT). We discover some new results concerning the existence of Wick ...